SC4503TSKTRT

Voltage Regulators - DC DC Switching Regulators Overview

The SC4503TSKTRT is a Semtech step-up switching regulator featuring an integrated 1.4A power transistor and a 1.3MHz constant switching frequency. It operates within an input voltage range of 2.5V to 20V, supporting output voltages up to 27V. The device utilizes peak current-mode control with internal compensation and offers programmable soft-start functionality to manage inrush current. Key electrical characteristics include a low saturation voltage switch rated at 260mV at 1.4A and a shutdown current below 1μA. Designed for high-voltage applications like Boost and SEPIC topologies, it accommodates small external passive components.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Integrates a 1.4A power switch with low saturation voltage for efficient power conversion
• Features programmable soft-start to eliminate high input current and output overshoot during startup
• Includes combined shutdown and soft-start pin with ultra-low shutdown current consumption
• Utilizes internal compensation network to accommodate wide voltage conversion ratios

Voltage Regulators - DC DC Switching Regulators Applications

• Local DC-DC converters
• TFT bias supplies
• XDSL power supplies
• Medical equipment
• White LED drivers

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the specific suffix 'TSK' against official Semtech documentation to confirm package type and tape/reel specifications. Ensure compliance requirements match project needs. Confirm availability through authorized channels to avoid counterfeit components. Cross-reference ordering information with the latest datasheet revision to ensure accurate part identification and functional parameters.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component for designs requiring compact size due to its ability to use tiny surface-mount passives. Ideal for portable devices where low shutdown current extends battery life. Suitable for applications needing fast transient response via current-mode control. Consider thermal management for the MLPD-W or TSOT-23 packages based on load conditions.

Voltage Regulators - DC DC Switching Regulators Part Context

Part of the Semtech SC450x series of high-frequency step-up regulators. Designed to replace older solutions by reducing component count and board space. Complements other Semtech PMICs for complete power management systems in consumer electronics and industrial applications.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

SC4503WLTRT: Similar 1.3MHz step-up regulator; verify package compatibility (MLPD-W vs TSOT-23) and pinout alignment before substitution.